// Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

export type ChatMessageRole = 'user' | 'assistant' | 'system'

export interface MessagePart {
  type: 'text' | 'imageUrl'
  text?: string
  imageUrl?: { url: string }
}

export type MessageContent = string | MessagePart[]

export interface ChatMessage {
  role: ChatMessageRole
  content: MessageContent
}
